Electric hoist.



A. S. BLOWERS. ELECTRIC BOIST: APYLIGATIONIILED'SBPT.19, 1910.

Patented Dec. 23, 1913.

A. S. BLOWERS'.

ELECTRIC HoIsT. APrLIoATIoN FLEDSEPT. 19, 1910.

Patented' Dec. 23, 1913.

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ELECTRIC HOIST. APPLIoATIoN FILED 322119, 1910.

1,082,398. l, Patented Dec. 23, 1913.

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Application filed September 19, i910. Serial No. 5l2,5"

To @ZZ 'whom it may concern Be known that l, ALONZO S. BLownns,

a citizen of the United States, residing in the city of lPortland, in the county of lay 5 and Starte of indiana, have invented certain new and nseinl improvements 1n ElecN trio Hoists, of which the following is a full, clear, and'irccurftte specification and exposition, being such as will enable others to make end use' the saine with absolute enact-1- tnde.

This invention is intended particularly es device .for elevating material in the construction of buildings, wherein two cars are provided which are o-ppositely disposed its to their movements up end down.

The obit-ct of 'my present invention, broadly speaking, is to provide a hoist whi li will be strong, and durable in con struction, easily operated and controlled, easily assembled#temporarily in position and easily talren down, and which can be mede and soldat s. comparative low price.

Another object is to provide an electric hoist adapted to transiter material both up and down et the seme time, one ear goingv upward as the 'other .car goes downward, usually one oar being loaded while the other is empty, all being; under the control oi so operator. f'

@ther o-byfts and perticnlztr advantage of my invention will be brought out inthe e of the following description, will be i in the' accompanying" three sheets of dra-.wings end will be correlated in the'eppended claim. l

Th preferred manner for carrying out' the objects of iny invention is shown in the acoompanying drawings., in which lo re shows my invention complete as in .it elevation. llig. 2 1s a plan, partly in section es teiten on line Qr-SZ oit Fig. i. l* is a side eievetion, showing certain iteatnreso the invention. And Fig. 4 is detail pien view of the top of the conindices denote like parte throughverel views of the three sheets of .er that the nconstruction and the tion of rny invention may be more t understood and coniprehended l will taire up a detail description thereoi. in. h l will, set/iorth the invention as "y and is comprehensively ias. l may.

the drawings letter A denotes the upward and they are connected by thecro zground line; B denotes the joists of the second floor; end C denotes the joist or lthe third floor or the roof.

Whenever' it is desired to place the hoist the ioists which might in the way are removed in order to provide an opening between the joists of sniiicient size.

Nunierals l and 2 denote the two sideH posts, and 3 denotes the center post. Said posts are set up vertically resting' on 'the sill l which is laid on the `ground A, or upenn platform, or upon joists, as desired. The posts are secured in vertical position as shown, extendingr up beyond the joist C through the derriclr hereinafter referred to.

hl'ounted on top' of the upper joists is a derrick comprising the four corner posts :3, G, 'Zand Posts and G are disposed at an angle" with relation to each other, tapej 'ne ing braces 9 and l0 which are arranged ss shown in Fig. 3. The other two posts,

and S, are arranged in the saine manner with relation to each other, but they are arranged parallel with relation to posts 5 and G, ns indicated in Fig. l. Posts 5 and 6 are connected at the top by the tie 1l, and posts T and 8 :tre likewise connected by the tie l2.

Resting across on ties ll and l2 are the fomfcross-ties 13, i3", 13 and 13. Dis posed across on top of the said cross-ties are the 'wo pulley-devices lei and l5v each consisting or two 'fl-atinembers spaced a. short distance apart and having two pulleys c and 5 and c and d, respectively, jonrnaled therebetween as shown. Pulley Z) is located directly over the center between posts l and 3, and pulley E is located direct-ly over the center between posts 2 and 3. For the purpose hereinafter nia de apparent the pulleys c and c are located nearer 'lo-- gether than are the pulleys Y) and d', this be ling accomplished by locating' the forward ends of members lil and l5 closer together than are the other ends thereof.

A car is adapted to operate up and down between the posts l and Said car cornpri'ses base' or. lioor Extending up from the center oi? cach sido of thef buse are the vertically disposed side members 2l and 2l. rlhe side members are connected to the corners of the car each by two angularly disposed braces 22 extending fromnieinber 2l.. and braces 23' extendin y in like manner troni member l, all as indicated in Fig. 3.

AMeinbers'2l and 2l ero connected their andA 26 extend from near the center of cross- Mic bar 24 at an angle and with their lower ends se ured to the members 2l and 21, respectively, as shown in Fig. l, which completes the left-hand car.

The right-hand car is the same in every particular as the above, same having the base or floor 30, the side-members 3l and 31, the braces 32 extending from member 3l, and braces 83 extending from member.

3l', also it is provided with the cross-bar/34 connecting the upper ends of members 81 and 31, and braces 35 and 36 extending from near the center of brace 84 at an angle with their lower ends secured to members 81 and 3l', respectively.

Secured in the center of the inner face of post l' is a guide-strip B which extends from end to end thereof. ln like manner secured opposite to guidestrip D, on the.lefthand face of post 3, is the guide-strip E. On the opposite face of post 3 is secured the guidestrip F, and opposite thereto on the inner face of post 2 is secured guide-strip G. Secured to each of the members 21, 2l', 31 and 3l are guide-blocks, two at the top, and two at the bottom of each, the guide blocks for each of said members being denoted by letters H, 1,5 and K, respectively. From the above it is apparent that the two cars are adapted to slide up and down by which the floors thereof may be brought even with the top o`f the joists of either setV of joists or to any other point therebetween as desired.'

Numeral 40 denotes a platform (F ig. 2) which should be. rigidly connected` to the ground or on the top of the joists B whereby it may not be easily lifted when iii-operation as presently described, or if desired the posts l, 2 and 3 may also rest on said platform as indicated in Fig. l which will help to retain the Asaid platform in position. Mounted on said platform are two pedestal hangers 4l and 42 in which is revolubly mounted the shaft 43. Secured on shaft 43 is the drum 44 which is coaxial therewith. The ends of said drumterminatein the heads 44a and 44b which are integral and coaxial with said drum'and they are larger in diameter than is the drum 44. Of larger diameter than said heads and secured on the ends thereof are the respective flanges 45 and 45f,same being coaxial ;.with said shaft 43., all substantially as indicated.

Numeral 50 denotes 'a eabledonthe likei one end of saidcableis secured around the center of thecross-.bar 24', of the left-hand car, where, itis secured by a clamp 51, from which it extends upward over pulley b, then over pulley d, then downward to the drum 44. After encircling the drum with several convolutions the cable again extends upward,

Apassing over pulley c, then. over pulley d;

and then downward to cross-bar 34 of the right-hand car, where it is secured by t-he clamp 52. Also mounted on shaft 43 is the large band-wheel 53. Located in alinementy with band-wheel and in the rear thereof is the small band-wheel 54, same being car. ried by shaft 55. Also carried on shaft is the band-wheel 56. Said shaft 55 is supported revolubly by the two pedestal hangers 57' and 58 which extend up from plati volve at a much slower rate of speed but at a speed of the desired sufficiency.

Numeral 63 denotes a stand located above and supported by the'platform 40. Located on the left-hand end of the stand 68 is the operators seat 64.

The brakemechanism comprises the segmental member 65 secured to block 66, the latter being supported on the platform 40. In the periphery of member 65 are square notches in which may engage the end of the plunger 67. Said plunger is adapted to slide up and down against the arm 68, parallel therewith, which latter is pivoted at'its lower end and is adapted to be moved forward and backward, there being a handle on its upper end which will be within reach of theoperatoron the seat 64. The plunger 67 is normally retained downward in engage-- spring thereby allowing the arm 68 to be moved forward or backward. Connected to the arm 68 is a band 72 whichv passes over the head 44a and then downward and rearward and with its other end secured to the platform 40. A brake-shoe 73 is secured to the inner face of band 72 which is adapted to lcontact with the periphery of the head 44a.

From' the above itis apparent that by moving the arm 68 rearward that the shoe .73 will be tightened againstA the head thereby locking'the drum, or if the arm 68 be moved forward then the drum will be re- ,leased from the shoe. The arm 68 may be locked in any position as desired.

.. Mounted on the stand 68, at the side of seat v64', is a double-switch, vcomprising the base 80 having nine contacts denoted by numerals 8l, 82, 83, 84, 85, 86, 87, 88 and 89, which are arranged in three rows of .three each, substantially as., indicated in connecting it with'contacts 84, 85 and 86;

Letters L, M and N denote the three service wires which conduct Ythe electric current vfrom the source of supply.; Said service wires are connected to contacts 81 82 and 83,' respectivel Three wires O, 15 and Q, lead into the motor, Vthe other ends of the last named wires are connected as follows: Wire O connects with contacts 88 and 86; wire P connects with intermediate wire R; and ,wireQ connects with intermediate wire S. Intermediate wire R connects 'the twocontacts 85 and 89, and intermediate wire S connects the two contacts 87 and. 84.

From the above it will be apparent that I provide a reversing switch, that is to saywhen the handle 90 is not connected with either the right or the left hand sets of contacts then no current can enter the motor land therefore it will not operate. If, however, handle 90 be turned to the right -so that it will engage contacts 87, 88 and 89 then the motor will operate in one direction thereby causing the drum to revolve causing one ofthe cars to be raised and at the same y time lowering theother car. Now should the handle 90 be thrown over to the left e11- gaging it with contacts 84, 85 and 86 then the electric current will operate the motor in the opposite direction which, manifestly, will reverse the movements of the cars up i 'and down.

In practice the in vention is to be used, primarily, in elevating brick, mortar, or

other material usually moved in wheelbarrows and the loaded-wheel barrow may be run onto the car which may be down cn the i ground line A,at which time the other car I at the saine time the other car will be low-y ered to receive its load. `When the first car will be at the highest point of elevation. Now the operator will release the brake and throw the handle 90 over to start the motor thereby causing the' load to be elevated, and

reaches its highest point then lever 90 is moved to the center cutting off the current, at saine time the brake is applied to hold the cars when desired. While the loaded wheelbarrow is being run off of the car last elevated another loaded wheelbarrow may be (topiesot this patent may be obtained for ve cents each, by addressing the Commissioner 9, or in place of' run onto the car which has just been lowered,l after which the operator willV then throw the switch to operate the motor in the opposite direction from that which it was last operated Vwhich willcause the cars to again change theirpositions. 4As the building increases in height the device may be changed accordingly: After another set of joistshave been positioned above the joists C then the derrick should be moved to position on top of the last placed joists, and at same time the platform -fl-O and the mechanisms carried thereon may be moved on up to rest on topof joists B.

All of the several parts are adapt-ed to be taken apart in sections suitable for handling and for transportation, and adapted to be again assembled in similar positions.

In order to adjust the invention to the several lioors or to additional floors, or to a less number of floors 'or sets of joists, the cable maybe made longer or shorter as desired, or it may be given a greater or a less number of convolutions around the drum,

I desire that it be fully 'understood that various changes may be made in the several details of construction without departingv from the Vspirit ofmy invention or of sacrificing any of the advantages thereof.

` Having now fully sho-wn and described.

my invention and the best exempliication thereof to me known at this time, what I yclaim and desire to secure'by Letters Patent' o fthe United States, is-

In' a hoist, the combination with a plurality'of horizontal joists and-a series of v guide posts arranged verticallyl thereof and extending up beyond said joists; of' a derrick 'mounted on the upper tier of joists and comprising a series of corner posts mounted in upwardly convergent relation, top and bottom tie rails connecting the respective pairs of posts last mentioned, crossties connecting the top rails, a pair of slotted frames horizontally mounted on the ties in convergent relation and carrying spaced pulleys therein, oppositely movable cars mounted in the first mentioned posts, a cable attached to each car and passed horizontally over the pulleys of the frames thereabove toward the convergent ends and a reversible motor mechanism` having a drum upon which said cables are oppositely wound to operate the cars.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

ALONZO S. BLOVVERS.

Witnesses Rosoon D. WHEAT, Ronnn'r W. RANDLE.

lf Patents,

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